his name was tyler davenport. when he arrived at the hospital, his core body temperature was 108 degrees. >> their stories were so similar. they were the same age, same height, the same... you know, kind of the same build, they played the same types of positions. >> they both presented with very high fever. both had been playing football, both had been doing practice, both had collapsed. football players are supposed to be so healthy and athletic, and to see them so critically ill was really hard for everyone. >> narrator: at arkansas children's that weekend, there were a total of four high school boys, all in serious condition with football-related injuries. >> probably at least two-thirds to three-quarters of the death in sport at high schools in america are related to football. the seriousness and intensity of high school football in america has just grown by leaps and bounds in the last five, ten years. >> there have always been injuries in high school football, but they're on the rise. the ramping up of press